diff --git a/eth/gasestimator/gasestimator.go b/eth/gasestimator/gasestimator.go
index 98a4f74b3e4..7e9d8125de8 100644
--- a/eth/gasestimator/gasestimator.go
+++ b/eth/gasestimator/gasestimator.go
@@ -170,7 +170,7 @@ func Estimate(ctx context.Context, call *core.Message, opts *Options, gasCap uin
 				break
 			}
 		}
-		mid := (hi + lo) / 2
+		mid := lo + (hi-lo)/2
 		if mid > lo*2 {
 			// Most txs don't need much higher gas limit than their gas used, and most txs don't
 			// require near the full block limit of gas, so the selection of where to bisect the